Pregnant women need to go into labor within 24 hours after the lung boosting injection, and no later than 24 hours after that. Therefore, you need to be ready to go into labor at any time after the injection. Lung promotion injection refers to the injection to promote the maturation of lungs, usually used in premature fetuses, can effectively promote the development of lung maturation of the fetus, so as to adapt to the environment outside the body. Lung promotion injections use hormones as the main ingredient, which can rapidly promote alveolar maturation, thus increasing the survival rate of premature babies after delivery and reducing the rate of organic damage or premature death. After the injection, pregnant women are required to use external monitoring devices under the supervision of the doctor to observe the fetal activity and the condition of the uterus in a timely manner. After 24 hours after the lung-promoting injection, the pregnant woman needs to complete labor. In case of preterm labor or unsatisfactory fetal signs, pregnant women can choose the appropriate fetal preservation plan for fetal protection or early delivery under the guidance of the doctor.